On Thu, May 23, 2013 at 11:11:12AM -0600, Jason Gunthorpe wrote:
> On Thu, May 23, 2013 at 12:01:11PM -0400, Jason Cooper wrote:
> > > > + /* Kirkwood resets some registers on gated clocks. Especially
> > > > + * CLK125_BYPASS_EN must be cleared but is not available on
> > > > + * all other SoCs/System Controllers using this driver.
> > > > + */
> > > > + if (of_machine_is_compatible("marvell,kirkwood"))
> > > > + wrlp(mp, PORT_SERIAL_CONTROL1,
> > > > + rdlp(mp, PORT_SERIAL_CONTROL1) &
> > > > ~CLK125_BYPASS_EN);
> > >
> > > of_machine_is_compatible seems heavy handed, I would expect this to be
> > > based on the compatible string of the ethernet node itself, not the
> > > machine??
> >
> > Is there a model number variation between IP that needs this and IP that
> > doesn't? If not, I'm fine with of_machine_is_compatible().
>
> Well the name 'mv643xx' is a family of system controller SOC's
> from ages ago, it seems reasonble to continue the trend and label the
> IP variations with the SOC name:
>
> compatible = "marvell,kirwood,ethernet", "marvell,mv643xx_eth"
Shouldn't it rather be
compatible = "marvell,kirkwood-eth", "marvell,orion-eth";
I'm inclined to go with of_machine_is_compatible() since the only
concrete difference we know is that the tweak is needed on kirkwood and
nowhere else.
If we had an errata, or a datasheet saying specifically flavor X needs
this and none other does, then we could trigger on the ethernet node
compatible string or a boolean in the node. But we don't have that...
thx,
Jason.
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